Flat-bed web-printing press.



S. G. 6088. FLAT BE D WEB PRINTING PRESS.

APPLICATION FILED NOV. 3. IBIS:

Patented Mar. 19, 1918.

2 SHEETS-SHEET I.

S. G. BOSS. FLAT BED WEB PRINTING PRESS.

APPLICATION FILED NOV. 3. I916. v

Patented Mar. 19, 1918.

2 SHEETS-SHEET 2.

UNITED STATES" PATENT OFFICE.

SAMUEL G. eoss, or GLENCOE, ILLINOIS. ASSIGNOB 'ro THE GOSS PRINTING rmass COMPANY, or emcaeo, rumors, A CORPORATION or rumors.

FLAT-BED WEB-PRINTING PRESS.

.- Specification of Letters Patent. Patented DIar. 19, 1918.

Application filed November 3,1916. Serial No. 129,378

My invention relates to flat-bedweb printing presses in which an impression cylinder is reciprocated along a flat printing surface, being adapted to have an operative printing stroke in one direction; being moved in the opposite direction in raised position relative to the printing surface. It is the principal object of my invention to provide new and improved means for raising the impression cylinder from the bed at the end of the operative stroke and for again lowering the impression cylinder at the end of the inoperative stroke. It is another object of my invention to provide a construction by which the vertical movement of the impression cylinder into and out of operative position shall be controlled by the rotation of the cylinder. It is another object of my invention to improve devices of this type in sundry details hereinafter pointed out. The preferred means by which I have accomplished'my several objects are illustrated inthe drawings and are hereinafter specifically described. That which I believe to be new and desire to cover by this application is set forth in the claims.

In the drawings: 7

Figure 1 is a diagrammatic side view of a press illustrating the type of machine for which my improvements are designed;

Fig. 2 is a side view of a portion of a press equipped with my improved." mechanism showing the impression cylinders in operative position just at the beginning of the operative stroke;

Fig. 3 is a view similar to Fig. 2, but

showing the impression cylinders inraised position substantially at the beginning of an inoperative stroke; I

Fig. 4; is a view of the mechanism atth end of the upper impression cylinder in Fig. 2 as seen from the right in said figure;

Fig. 5 is a top View of an arm mounted upon the shaft of the impression cylinder as the same is seen in Fig. 2;and

Fig. 6 is a view similar to Fig. .2, but showing a modified form, of construction. v

Referring to Figs. 1 to 5 in which corresponding parts are indicated by the same reference characters,y

10 indicates a frame, supporting type beds orother printing surfaces 1l'12 of any suitable character; A carriage 13 is slidably mounted upon the frame 10 being adapted to be reciprocated back and forth along the beds 11 and 12 by means of connecting links 14 which are actuated by drive wheels 15 rotated by power from any suit- 7 able source.

- Revolubly mounted in the carriage 13 at each sideof the press is an eccentric 16 in which is revolubly mounted eccentrically thereof a'shaft 17 upon which is fixed an 7 impressioncylinder 18 adapted to be reciprocated along the bed 11. Thecarriage 13 is also provided with eccentrics-19 revolubly mounted therein at its sides, in which is revolubly mounted eccentrically thereof a shaft 20 upon which is fixed an impression i cylinder 21. The eccentrics 16 and 19 at each side of the machine are connected together by means of a vertical link 22 which connects arms 23-24 carried by said eccentrics respectively. As will be readily understood, as the eccentrics 16 and 19 are rotated in counterclockwise direction inFig. 2, the shafts 17 and 20 are raised relative to the beds 1112. The eccentric 16 is provided with an arm 25 to which the upper end of a coiled spring 26 is connected, the other end of such spring being connected toa suitable portion of the carriage 13,- the spring 26 being adapted to hold the eccentrics 16 and 19 turned to the limit of theirrotation in counterclockwise direction in Fig. 2, serving thus to hold the impression cylinders 18 and 21 yieldingly in raised position. Each in one direction upon the operative stroke and in the reverse direction upon the inoperative stroke, as is well understood in presses of this type.

Meansis provided for moving the cylinders downward at the end of their inoperative stroke against the action of thespring l 26 and for holding the cylinders in their lowered position during the operative stroke. This means comprisesarms29 mounted upon the,ends ofthe shaft 17, the arms 29 being provided on their inner faces with lugs 30 which are adapted to be brought into" con-- tact as hereinafter described with lugs 31 carried on the outer faces of the arms 28. As is best shown in Fig. 2, the lugs 30 and the arms 29 are so arranged relative ,to the impression cylinder 18 that the lug 30 is brought into contact with the upper face of the lug 31 substantially at the end of the movement of the carriage 13 to the right in Fig. 2, serving to move the arm 23 clownward against the action of the spring 26. The arm 23 is provided with a latch lever 32 which is moved ,at this juncture by a spring 33 in clockwise direction in -Fig. 2 into engagement with a notch in anal-m 35 carried by'thecarriage '13, the engagement of the latch lever with the arm-35serving to hold the eccentric'lti against movement in counterclockwise direction in said figure and serving thus to hold the impression cylinder 18 in its lowered operative position during the movement of said cylinder to the left in said figure. Upon the novement of the cylinder to the left in Fig. 2, the cylinder will be given a rolling rotation in counterclockwise direction in said figure, bringing the lug 30 in due time into contact with the lower face or the lug 31 as shown in Fig. 3 for moving the eccentric 16 positively in counterclockwise direction for raising the cylinder 18 out oi operative position. This action is made possible by a pin 36 mounted upon the arm '29 which engages an arm 37 mounted upon the shaft 38' upon which the latch 32 is mounted for moving said lever against the action of the spring 33 out of engagement with the notch 3% of the arm 35 so as to permit the desired movement of the eccentric 16. As will be readily understood, by reason of the connection of the eccentrics l6 and 19 through the link 22, the cylinders 18 and 21 are moved up and down in unison. By reason of the engage ment of the'l ug 30 with the lug 31 substantially at the time when the connecting links 1% areat their dead-center position and when the carriage 13 is accordingly moving at a very slow rate, the operative engagement is efiected without injury to the parts;

' "In Fig. 6 which illustrates a-modified construction, the link 22 at each side of the machine is omitted, and the mechanism for controlling the cylinder 18 is duplicated in conneetion with the cylinder 21. For convenience, in the construction shown, a coiled spring 39 is connected to the forward end of the arn1c24: of the eccentric 19 for holding the eccentric yieldingly against clockwise movement in said figure, inlieu of the spring 26 as described in connection with the eceri ri i i th ee eans i fien i practically the same and theoperation is exact ys m la i What I claim as my invention and desire cinder revolubly mounted between said eccentrics, means for reciprocating said carriage for carrying said cylinder along said bed, means for rotating said cylinder, and

' means actuated by the rotation of 1e cylinder for turning said eccentrics for raising the cylinder out of operative position at the end of the operative stroke.

3. In a printing press, the combinatimi of a bed, a carriage, eccentrics revolubly mounted in said'carriage, an impression cylinder revolub'ly mounted between said eccentrics, means for reciprocating said carriage for carrying said cylinder along said bed, means for rotating said cylinder, arms carried around by the rotation of said cylinder adapted at the end of an inoperative stroke of the cylinder to engage said eccentrics and give them a slight rotation, for moving said cylinderdownward into operative position,

and latches operatively connected with said eccentrics adapted automatically to engage suitable portions of said carriage for main taining the cylinder in lowered operative position;

a. In a printing press, the combination of abed,a carriage, eccentrics revolubly mounted in said carriage, an impression cylinder revolubly mounted between said eccentries, means for reciprocating said carriage for carrying said cylinder along said bed, means for rotating said cylinder, latches pivotally' mounted on said eccentrics and adapted to engage said carriage for holding the eccentrics in turned position for maintaining the cylinder in lowered operative position, and-arms carried around by the rotation of said cylinder adapted at the end of an operative stroke of the cylinder to release saidlatches from said carriage for permit ting rotation of the eccentrics and adapted to engage said eccentrics and give them a slight rotation for raising sa-id cylinder out o f op'erative position.

Copies this patent may be obtained for five cents each, by addressing the Commissioner of Emerita, 4

Washington, *1). G. 

